gtk build crashing

[robert]

cvs update on 23rd Feb, I regularly get a crash (well an exit raher than a
crash) with the message

X protocol error: BadDrawable (invalid Pixmap or Window parameter) on
protocol request 62 

Under gdb I get
gdb packages/emacs/src/emacs
GNU gdb 5.2.1-2mdk (Mandrake Linux)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-mandrake-linux-gnu"...
(gdb) run -name rajm
Starting program: /home/robert/packages/emacs/src/emacs -name rajm
X protocol error: BadGC (invalid GC parameter) on protocol request 62

Program exited with code 0106.

This is happening when using blackbox (0.65) as a window manager with multiple
workspaces and using keybindings to move between workspaces

It happens at the point when I change between workspaces and when (I
think) emacs is trying to update a buffer

I've not managed a minimal case so far but it is crashing at some point
virtually every time I run it - though sometimes not for 1hr or more after
starting

In GNU Emacs 21.3.50.11 (i686-pc-linux-gnu)
 of 2003-02-23 on jailhouse.chezmarshall.freeserve.co.uk
configured using `configure '--with-x-toolkit=gtk''

Important settings:
  value of $LC_ALL: address@hidden
  value of $LC_COLLATE: en_GB
  value of $LC_CTYPE: en_GB
  value of $LC_MESSAGES: en_GB
  value of $LC_MONETARY: en_GB
  value of $LC_NUMERIC: en_GB
  value of $LC_TIME: en_GB
  value of $LANG: en_GB
  locale-coding-system: iso-latin-9
  default-enable-multibyte-characters: t

R
-- 
Robert Marshall